Working with arrays is no easy task, but PHP makes it easier by providing a selection of functions that can sort, shuffle, intersect, and filter them. As with other functions, there is only space here to choose a selection; this is by no means a definitive reference to PHP’s array functions.
The easiest function to use is
array_unique(), which takes an array as its only parameter and returns the same array with all duplicate values removed. Also in the realm of “so easy you do not need a code example” is the
shuffle() function, which takes an array as its parameter and randomizes the order of its elements. Note that
shuffle() does not return the randomized array; it uses your parameter as a reference and scrambles it directly. The last ...